small intestine
US /ˌsmɔːl ɪnˈtes.tɪn/
UK /ˌsmɔːl ɪnˈtes.tɪn/

1.
小腸
the part of the intestine that runs between the stomach and the large intestine; the duodenum, jejunum, and ileum collectively.
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Nutrients are absorbed into the bloodstream primarily in the small intestine.
栄養素は主に小腸で血流に吸収されます。
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Problems with the small intestine can lead to malabsorption.
小腸の問題は吸収不良につながる可能性があります。